Sounds like a runner, dont see why you cannot get her into the 8's with that piece. As for carb spacers, ehh. I have dynoed alot of engines and seems you can stack them to the ceiling and make more power and put it in the car and see ZERO gains. Its all about plenum volume for the given combo, if its good its good. FWIW we have had the best luck with the ones we have made for our stuff to match the carb size more than a generic spacer. I believe that is do more to fuel shear atomization and droplet size than anything else.